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Auto StartStop error

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Old Nov 27, 2021 | 12:17 PM
  #61  
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I told you in reply 59 that it would happen if the truck sat to long in cold temps.
General Bulletin 2 on battery service tells you the battery >>>core<<< will not come up to temperature for some 3 to 4 hours unless the temperature is above 41 degrees.
Driving off, don't just assume the battery will be up to temperature in it's core area on short short drive time.
The electrical design of auto start is not to blame but the battery supply to power it, is.
Think a little bit about it!
I advise to switch auto start it off during winter months and cold temps.
That's why the switch is on the dash to do so. It has to be switched off each time the ignition is >turned on.
I have a 2018 10 speed and know all this back ground info.
The older the battery the more issue will had with auto start.
I also told you that in post 59.
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Old Nov 27, 2021 | 08:10 PM
  #62  
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Originally Posted by Bluegrass
I will try to explain one reason auto start may fail.
Conditions; truck sets in very cold temps for more than one day.
Cranking drains power from the AGM battery.
Battery is also cold at the prevealing outside temperature.
The battery will only accepts a lower charge voltage rate, by design because the negitive cable has the Sensor that detects the conditons and inhibits auto start and results in the dash screen you see..
You don't drive far enough or long enough for the engine bay to heat the battery and except a higher charge rate for a faster recovery time..
Drive, shut motor off, crank again, the battery has even less charge left for auto starting.
You have an auto start faulure.
Why?
The motor needs an electric fuel pump for fuel, the transmission needs it's electric fluid pump located on the outside of the transmission so the tansmission will propel the vehichle in gear when the motor starts again.
If the battery voltage is too low to complete auto start functions, you will have a failure.
If the battery is aged and does not recover charge fast enough due to age and or temperature, you will have auto start failure.
I cannot explain it any simpler.
You need to know what's involved and not just complain when there is a cause present or you have a battery that is too cold for auto start conditiins, at times or there is to many stop starts before the battery recovers charge.
The system may still be able to start the motor but not in auto start mode for the above reasons.
I had been driving over 30 minutes and 25 miles when this happened to me and the air temperature was around 62*F in the middle of the day. I wasn't using heated seats, climate control, or anything that uses excess power.

The problem with your battery idea is that this is happening when people have *** turned off. The engine shouldn't be stalling in these cases.
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Old Nov 27, 2021 | 09:33 PM
  #63  
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You then have some other issue than SS to blame it on.
A battery will not just stall out the motor.
There is still an alternator running.
What say you?
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Old Nov 28, 2021 | 01:12 PM
  #64  
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Have any of you ever looked at your system performance from behind the steering wheel to see if and when there is a potential problem?
Hold the >left center steering wheel button down.
Turn On the ignition switch but do not crank the motor.
Waite for the little dash screen to go to Engineering mode.
Step the up or down button about 42 times to the battery voltage data screen.
It should show 12.2 volts +/- a tenth of so. depending on battery charge and condition/age etc..
At cranking, observe a good battery will not drop below 10 volts unless aged. A hint for the near future replacement.
At running, the voltage should go up to the charge level the battery is demanding. That depends on the health and battery core temperature, especially in winter temps and how long the truck has set. The voltage should eventually rise above 14.2 volts or possibly 14.6 volts and remain there most of the drive time.
.
If these parameters are very far off, expect stop start function to fail/ or at times.
To review: The motor needs a fuel pump to run, ignition and fuel injectors to work, transmission fluid pump to work at a min.
If the Computer detects any part of this system in fault there will be no auto restart once the motor has turned off.
For example, if the trans fluid pump does not run or come up to pressure, the trans will not allow the truck to move so no use the motor starting.
At this point, the battery will usually have enough power to restart the system by ignition switch once the ignition is cycled Off then On for manual restart.
If no crank or very/ slow crank, you have a major battery fault or charging fault.
Bottom line is you have all the diagnostics you need to see what and why there is a system failure right on most of the trucks.
If the motor stalls with the auto start switched off, you have some other issue causing stalling.
.
I have just replaced a 4 year old battery with a new OEM AGM and plainly see the differences between an aged battery and a new unit.
This thanks to a member of family who left the parking lights on for 3 days in my absence and ruined what life was left in the original battery. It's what you call "been there done that". Could not even jump start under the condition.
Btw, my 02 F150 also has dash engineering mode to use and look at many functions but in a different readout display. So none of this is new and at least a 20 year old capability in the trucks.


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Old Jan 3, 2022 | 08:54 PM
  #65  
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Originally Posted by Bluegrass
Have any of you ever looked at your system performance from behind the steering wheel to see if and when there is a potential problem?
Hold the >left center steering wheel button down.
Turn On the ignition switch but do not crank the motor.
Waite for the little dash screen to go to Engineering mode.
Step the up or down button about 42 times to the battery voltage data screen.
It should show 12.2 volts +/- a tenth of so. depending on battery charge and condition/age etc..
At cranking, observe a good battery will not drop below 10 volts unless aged. A hint for the near future replacement.
At running, the voltage should go up to the charge level the battery is demanding. That depends on the health and battery core temperature, especially in winter temps and how long the truck has set. The voltage should eventually rise above 14.2 volts or possibly 14.6 volts and remain there most of the drive time.
.
If these parameters are very far off, expect stop start function to fail/ or at times.
To review: The motor needs a fuel pump to run, ignition and fuel injectors to work, transmission fluid pump to work at a min.
If the Computer detects any part of this system in fault there will be no auto restart once the motor has turned off.
For example, if the trans fluid pump does not run or come up to pressure, the trans will not allow the truck to move so no use the motor starting.
At this point, the battery will usually have enough power to restart the system by ignition switch once the ignition is cycled Off then On for manual restart.
If no crank or very/ slow crank, you have a major battery fault or charging fault.
Bottom line is you have all the diagnostics you need to see what and why there is a system failure right on most of the trucks.
If the motor stalls with the auto start switched off, you have some other issue causing stalling.
.
I have just replaced a 4 year old battery with a new OEM AGM and plainly see the differences between an aged battery and a new unit.
This thanks to a member of family who left the parking lights on for 3 days in my absence and ruined what life was left in the original battery. It's what you call "been there done that". Could not even jump start under the condition.
Btw, my 02 F150 also has dash engineering mode to use and look at many functions but in a different readout display. So none of this is new and at least a 20 year old capability in the trucks.
I just had this happen today for the first time. Truck is a 2018 Lariat with just under 44k miles. It has been COLD the past couple nights - single digits. While my truck is parked in our attached garage, the garage is not insulated, so it's still quite cold in the garage.

I had just picked up my kids from daycare and was coming up behind a car and came to a brief stop and bang - engine shuts down and I got the same screen as others have posted. I was on a very busy street but luckily the stop lights were in my favor and I was able to fire the truck back up without too much traffic racing by. I immediately shut off the *** (good acronym ) and made it home without further issue. I immediately assumed this was a battery issue give the temp, battery age and fact I have barely driven in the past couple weeks.

I checked my owners manual on charging the battery while still in the engine bay/connected to the truck. I read the part on the BMS system but it wasn't all that clear if it's okay to hook your charger to the battery while it's still connected to the truck? It seems you may want to have the black lead from the charger hooked to the grounding point by the battery rather than the negative terminal? Any insight would be appreciated.

Last edited by BrewCityF150; Jan 3, 2022 at 08:58 PM.
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Old Aug 20, 2022 | 11:28 PM
  #66  
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I drove f150(2019) with whole family in the middle line on highway . The engine died and showed “ auto startstop shift to p, then restart engine”. Every cars rush to me, I couldn’t start the car and froze on highway. Everyone passed me with a horn and middle finger. I called ford road assistance, they told me they could do nothing and let me call 911. It was better that 2 police cars came and guarding me off highway.
I confused why ford didn’t put a fu**ing space between “startstop” , so many ford cars have the same serious problem, ford did nothing and didn’t send a recall

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Old Aug 21, 2022 | 11:31 AM
  #67  
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You did not do what the small screen told you to do.
Simple to put the shifter in Park and restart the engine and drive off.
And simple to turn off stop/start function.
Then come here to show how ignorant you are that you cannot read and follow a simple instruction.
I'm sorry to say it like this but people have to wake up and stop needing to be led by the hand on everything.
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Old Aug 21, 2022 | 02:28 PM
  #68  
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Originally Posted by Bluegrass
You did not do what the small screen told you to do.
Simple to put the shifter in Park and restart the engine and drive off.
And simple to turn off stop/start function.
Then come here to show how ignorant you are that you cannot read and follow a simple instruction.
I'm sorry to say it like this but people have to wake up and stop needing to be led by the hand on everything.
I did shift to p then restart then shift to d then engine died and then turned the key and pulled out and put in the key and turned on 10 times one time lucky worked and drove 10meters died again , what drove you subjective guess others not followed the instructions.
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Old Aug 21, 2022 | 02:34 PM
  #69  
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Originally Posted by dogonice
I did shift to p then restart then shift to d then engine died and then turned the key and pulled out and put in the key and turned on 10 times one time lucky worked and drove 10meters died again , what drove you subjective guess others not followed the instructions.
the right instructions words should be “ auto start/stop fail, shift to p, then restart “
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Old Aug 21, 2022 | 03:05 PM
  #70  
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Did you see that Orange A inside the Orange circle?
That switch is the right most bar switch on the dash with a circle A.
If you did not turn the SS off it will keep trying to function.
Review your Owner manual pages 185, 186, 187.
Note on right column, bottom note.
And page 116.
You cannot put the responsibility on others for what you did or did not do.
You was pretty quick on taking a picture but not paying attention to what had to be done.
Good luck.
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